matches method

bool matches (Pattern pattern)
override

Returns whether or not pattern matches at the current position of the string.

This doesn't move the scan pointer forward.

Implementation 

bool matches(Pattern pattern) {
  if (!super.matches(pattern)) {
    _lastSpan = null;
    return false;
  }

  _lastSpan = _sourceFile.span(position, lastMatch.end);
  return true;
}